Plugin: admin routes - Page Not Found

// index
routes.MapRoute("CustomerServiceAdmin",
    "admin/Plugins/CustomerService/{action}/{id}",
    new {controller = "_CustomerServiceAdmin", action = "Index", id = UrlParameter.Optional},
    new[] {"Nop.Plugin.Misc.CustomerService.Controllers"})
    .DataTokens.Add("area", "admin"); 

// list
routes.MapRoute("CustomerServiceAdmin.List",
    "admin/Plugins/CustomerService/{action}/{id}",
    new {controller = "_CustomerServiceAdmin", action = "List", id = UrlParameter.Optional},
    new[] {"Nop.Plugin.Misc.CustomerService.Controllers"})
    .DataTokens.Add("area", "admin"); 

// create
routes.MapRoute("CustomerServiceAdmin.Create",
    "admin/Plugins/CustomerService/{action}/{id}",
    new {controller = "_CustomerServiceAdmin", action = "Create", id = UrlParameter.Optional},
    new[] {"Nop.Plugin.Misc.CustomerService.Controllers"})
    .DataTokens.Add("area", "admin"); 

// edit
routes.MapRoute("CustomerServiceAdmin.Edit",
    "admin/Plugins/CustomerService/{action}/{id}",
    new { controller = "_CustomerServiceAdmin", action = "Edit", id = UrlParameter.Optional},
    new[] { "Nop.Plugin.Misc.CustomerService.Controllers" })
    .DataTokens.Add("area", "admin"); 

// delete
routes.MapRoute("CustomerServiceAdmin.Delete",
    "admin/Plugins/CustomerService/{action}/{id}",
    new { controller = "_CustomerServiceAdmin", action = "Delete", id = UrlParameter.Optional },
    new[] { "Nop.Plugin.Misc.CustomerService.Controllers" })
    .DataTokens.Add("area", "admin");

The controller for path '/Admin/Plugins/CustomerService' was not found or does not implement IController.

System.Web.HttpException (0x80004005): The controller for path '/Admin/Plugins/CustomerService' was not found or does not implement IController. at System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) at System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) at System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

routes.MapRoute("CustomerServiceAdmin",
                "Plugins/CustomerService/{action}/{id}",
                new {controller = "_CustomerServiceAdmin", id = UrlParameter.Optional},
                new[] {"Nop.Plugin.Misc.CustomerService.Controllers"});

using System.Web.Mvc;
using System.Web.Routing;
using Nop.Web.Framework.Mvc.Routes;

namespace Nop.Plugin.Misc.CustomerService
{
    public partial class RouteProvider : IRouteProvider
    {
        public void RegisterRoutes(RouteCollection routes)
        {
            routes.MapRoute("Nop.Plugin.Misc.CustomerService.Test",
                 "Plugins/CustomerService/Test",
                 new { controller = "Test", action = "Test" },
                 new[] { "Nop.Plugin.Misc.CustomerService.Controllers" }
            );

          
        }
        public int Priority
        {
            get
            {
                return 0;
            }
        }
    }
}

using System.Web.Mvc;
using Nop.Plugin.Misc.CustomerService.Models;

namespace Nop.Plugin.Misc.CustomerService.Controllers
{
    public class TestController : Controller
    {

        public ActionResult Test()
        {
            var model = new PageListModel();
          
            return View("Nop.Plugin.Misc.CustomerService.Views._CustomerServiceAdmin.List", model);

        }

    }
}